CN105690058B - A kind of product intelligent assembly method based on movement pair surface identification - Google Patents
A kind of product intelligent assembly method based on movement pair surface identification Download PDFInfo
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- CN105690058B CN105690058B CN201610182225.2A CN201610182225A CN105690058B CN 105690058 B CN105690058 B CN 105690058B CN 201610182225 A CN201610182225 A CN 201610182225A CN 105690058 B CN105690058 B CN 105690058B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
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Abstract
The present invention relates to a kind of product intelligent assembly method based on movement pair surface identification, this method includes the following steps：1) each part of product is obtained；2) surface of each part is extracted, and is classified to the surface, establishes the behavior surface collection of each part；3) the behavior surface set of each part is traversed, according to movement pair surface pair principle, obtains the mating face on each behavior surface, forms assembling solution；4) constraint degree evaluation is carried out to the assembling solution, judges whether evaluation result meets sets requirement, if so, step 5) is performed, if it is not, then return to step 3)；5) product that output assembling is completed.Compared with prior art, the present invention has many advantages, such as that high degree of automation, assembling are accurate.
Description
Technical field
The present invention relates to a kind of Product Assembly method, more particularly, to a kind of product intelligent based on movement pair surface identification
Assembly method.
Background technology
With the accelerated development of economic globalization and global IT application, huge change is occurring for the production model of product
Change, multi items, small lot production model are gradually changed by few kind, high-volume, time of product development occurs and does not adapt to
Product life cycle constantly shortens the problem of requiring.In the development process of product, Product Assembly is the full Life Cycle of product manufacturing
One of the step of interim most important, consuming great effort and time, be the main process for realizing product function.Therefore, product
Trim designs play conclusive effect to entire product quality.
The research of Product Assembling Design mainly includes the assessment of the assembling structure of product and optimization, assembly sequence-planning and dress
The design and optimization of match system.The effective ways for improving Product Assembly level are to change traditional design side using computer technology
Formula.The expression process of product gene can obtain the part grade product with location information and dimension information.So how will be from
Scattered part is intelligently assembled up by certain crucial connection relationJust how such as hole surface is automatically found is matched with it
The perimeter surface of conjunctionAlso there are the deficiencies of the degree of automation is not high, assembling accuracy is inadequate for existing product assembly method.
Invention content
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of high degree of automation,
Product intelligent assembly method of the assembling accurately based on movement pair surface identification.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of product intelligent assembly method based on movement pair surface identification, this method include the following steps：
1) each part of product is obtained；
2) surface of each part is extracted, and is classified to the surface, establishes the behavior surface collection of each part；
3) the behavior surface set of each part is traversed, according to movement pair surface pair principle, obtains each behavior surface
Mating face forms assembling solution；
4) constraint degree evaluation is carried out to the assembling solution, judges whether evaluation result meets sets requirement, if so, performing
Step 5), if it is not, then return to step 3)；
5) product that output assembling is completed.
In the step 2), the classification of piece surface includes behavior surface and non-behavior surface.
In the step 2), the surface for extracting each part is specially：
201) function-behavior stream duplex structure of product is obtained according to the part of product and function, according to the function-row
Behavior stream chain is obtained for stream duplex structure；
202) behavior surface is solved according to each behavior stream cipher on behavior stream chain, according to the behavior table solved
Face obtains non-behavior surface.
The step 3) is specially：
301) a behavior surface a in a certain behavior surface set A is obtained, is searched in gathering on other behavior surfaces
One can be paired into another behavior surface b of kinematic pair with behavior surface a；
302) the behavior surface set A is traversed；
303) behavior surface set A is replaced with into another behavior surface set B, return to step 301), until all behaviors
Surface COLLECTION TRAVERSALSThe finishes.
The kinematic pair includes prismatic pair, revolute, spherical pair, gear pair, screw pair and cam pair.
In the step 4), the evaluation result of constraint degree evaluation is obtained according to artificial experience.
Compared with prior art, the present invention is gathered by searching for certain types of surface i.e. behavior surface, composition surface, after
And rational kinematic pair mating face is found in gathering on behavior surface, achieve the purpose that automatic assembling, have below beneficial to effect
Fruit：
(1) present invention is first identified the surface of product parts, by the surface type identified, according to kinematic pair
Various types carry out the assemblings of product parts automatically, improve product automation degree.
(2) the present invention is based on movement pair surface pair principle find can matched part, and pass through constraint degree evaluation carry out
Feasibility judges, effectively increases the accuracy of Product Assembly.
(3) present invention at the surface for extracting each part by the way of function-behavior stream duplex structure, surface extraction
Accuracy is high.
Description of the drawings
Fig. 1 is the flow diagram of the present invention；
Fig. 2 is kinematic pair coding structure tree schematic diagram；
Fig. 3 is the translation process schematic diagram of product gene；
Fig. 4 is the structure of toggle and its behavior surface.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.The present embodiment is with technical solution of the present invention
Premised on implemented, give detailed embodiment and specific operating process, but protection scope of the present invention is not limited to
Following embodiments.
As shown in Figure 1, the present embodiment provides a kind of product intelligent assembly method based on movement pair surface identification, this method
Idiographic flow is as follows：
In a step 101, each part of product is obtained.
In a step 102, the surface of each part is extracted, and is classified to the surface, establishes the row of each part
For surface collection.The classification of piece surface includes behavior surface and non-behavior surface.
The surface for extracting each part is specially：
201) function-behavior stream duplex structure of product is obtained according to the part of product and function, according to the function-row
Behavior stream chain is obtained for stream duplex structure；
202) behavior surface is solved according to each behavior stream cipher on behavior stream chain, according to the behavior table solved
Face obtains non-behavior surface.
In step 103, the behavior surface set of each part is traversed, according to movement pair surface pair principle, is obtained each
The mating face on behavior surface forms assembling solution, specially：
301) a behavior surface a in a certain behavior surface set A is obtained, is searched in gathering on other behavior surfaces
One can be paired into another behavior surface b of kinematic pair with behavior surface a；
302) the behavior surface set A is traversed；
303) behavior surface set A is replaced with into another behavior surface set B, return to step 301), until all behaviors
Surface COLLECTION TRAVERSALSThe finishes.
At step 104, constraint degree evaluation is carried out to the assembling solution, judges whether evaluation result meets sets requirement,
If so, step 105 is performed, if it is not, then return to step 103.
In step 105, the product that output assembling is completed.
The said goods Intelligent assembly method is gathered by searching for certain types of surface i.e. behavior surface, composition surface, after
And rational kinematic pair mating face is found in gathering on behavior surface, achieve the purpose that automatic assembling.
1st, kinematic pair is theoretical
Kinematic pair refers to that two components are in direct contact and can generate being actively coupled for relative motion.Two parts are connect by surface
It touches and forms kinematical constraint, this constraint is constraint of kinematic pair.Mechanism kinematic pairs can be divided into simple motion pair and complicated fortune
Two classes of dynamic pair.Simple motion is secondary mainly to include planar contact pair, prismatic pair, revolute, spherical pair, cylindrical pair etc., and complicated pair includes tooth
Wheel set and cam pair etc..When describing product kinematic pair, mainly with following three parts：Complexity, contact type and constrained type.
Complexity is to show the complexity type of kinematic pair, including simple secondary and complexity pair.Contact type shows two components of kinematic pair
Geometric properties during moving contact, including point, axis and plane.Constrained type characterizes the concrete type of kinematic pair, such as plane
Pair, spherical pair, revolute etc..
It can be found that different types of kinematic pair, mating face's type is had nothing in common with each other, contact type Ye You areas
Not.In Intelligent assembly, it can be identified by surface type and the selection of contact type uniquely determines a kind of kinematic pair, so as to
Also achieve a kind of assembling solution.Table 1 lists common kinematic pair type and its surface type and contact type.
Table 1 common kinematic pair type and its feature
The coding structure of kinematic pair can be represented with code tree, as shown in Fig. 2, first layer node on behalf kinematic pair in figure
Complexity type, the second layer represents the contact type of the types such as point, axis and plane, and third layer node on behalf specifically moves
Secondary type.Side between node represents membership.
2nd, the realization of Intelligent assembly
Part is the building block of product, and part is assembled to form the product of certain function by the association of kinematic pair.
Again by the gene expression process of product it is found that part is different types of surface is combined according to certain constraints.Table
Face is broadly divided into behavior surface and non-behavior surface.Behavior surface is the material carrier of performance behavior effect.In assembly, zero
Interrelated or interaction between part is necessarily generated by this class behavior surface.In kinematic pair theory, inhomogeneity
The kinematic pair of type has different types of mating face, as revolute is composed of by cylindrical surface and cylindrical surface.So part
Assembling is exactly to search for rational surface and match to form kinematic pair.Since under a few cases, different types of kinematic pair is by identical
Mating face composition, so needing manually to be made to determine whether to meet actual requirement after a reasonable solution is formed, be not inconsistent such as
Conjunction needs to seek another assembling solution again.Specific installation step is as shown in Figure 1.
In the present invention, realized when extracting the surface of each part using product gene.Although bion possesses reality
Gene, product is without practical product gene, but product also possesses similar hereditary information.Such as in the design and manufacture of product
Cheng Zhong, feature possessed by parts can be regarded as to the transcription and translation of product hereditary information as a result, feature formation sequence
And specific size shape is all controlled by gene.So in terms of macroscopic perspective, product gene is the ordered set of product information, it
Define the mechanism that product structure automatically generates, under the stimulation of appropriate external condition, automatically create product, and with extraneous ring
Specific function is completed in border interaction.
From the point of view of the process of product design, function-driven behavior, behavior again control structure.Function is located at whole design chain
Top, it is to entire the product even high abstraction of product family's character.Function can be broken down into subfunction until function
Member, Functional Unit are the minimum composition units to form function.The function of product is according to serial or parallel by multiple Functional Units
Relational organization realized into function flow.Meanwhile there are stringent mapping relations between behavior and function.In biological gene molecule
In, duplex structure ensure that the stability of gene molecule so that hereditary information can steadily be transmitted to the next generation.And this stabilization
Duplex structure has benefited from the effect of intermolecular chemical bond.This chemical bond is similar to mapping relations one by one mathematically.With life
Object gene structure is similar, and it is also double-stranded helical shape structure that the present invention, which defines product gene structure, i.e. function-behavior stream double-strand knot
Structure.
Fusion coding is carried out to function and behavior, all hereditary information are attached in one-dimensional data structure.Just as biology
Gene is the same, and part gene is also classified into code area and noncoding region.Code area is the region for referring to provide template for transcription, it
Corresponding structural solid can be synthesized.And noncoding region is the coded strings for not carrying transcriptional information directly, but it can regulate and control
The expression of hereditary information.
In organism, the translation of gene is a very complicated process, be briefly described for：Related enzyme, confactor and
The amino acid of activation is assembled on ribosomes to the process for protein and peptide chain under the action of energy.It is specific in order to translate to obtain
Amino acid, entire translation process needs the support of " codon " mechanism.Codon refers to determine the three of an amino acid on RNA
A adjacent base puts in order.Each codon can only determine a kind of amino acid classes, and a kind of amino acid can have it is more
A codon obtains.So amino acid and its codon form a complicated cipher table.
Corresponding to the translation of part gene, whole process is also required to the support of " codon " mechanism, can just make behavior stream chain
On each behavior stream be mapped to best structure solution.Codon mechanism at this than more complicated in biological scope because
The mapping that behavior flows to structure is the relationship of multi-to-multi, and a kind of behavior stream can determine a plurality of types of structures, and a kind of structure
It can also be realized by a plurality of types of behavior streams.So invention defines behavior stream cipher, that is, use for reference behavior stream-structure
Knowledge base, the behavior of specifying flow to the mapping relations function of structure, to solve the mapping Solve problems between them.
Behavior stream cipher is the unit genetic fragment in a node and behavior gene on behavioral chain.It is recorded
Support the behavioral genetics information of corresponding function, the structured set that it is mapped also includes the basic component units of entire part.Root
According to design experiences, in design of part, surface is the basic element to form shape.So each behavior stream cipher solves
Structure be known as behavior surface.Behavior surface contains geometry information and behavioural information, it is a kind of concept structure.Behavior
Surface does not have specific size, without detailed location information yet.Not sky is continuous by solving the behavior surface obtained
Between continuous geometry body, and connect the surface types such as sealing surface, modification of surfaces, referred to as non-behavior surface.Behavior surface has row structure
Duality using the smaller surface of granularity as information carrier, had both described part behavior or comprising structural information, so as to set up
The mapping mode of function-behavior-behavior surface-detailed construction, makes that Element Design flow is more complete, and information representation is more flexible.
According to behavior surface restraint of liberty degree number, behavior surface can be divided into 10 types：Facet, is put down greatly at long plane
Face, Short Cylinder Surface, oval cylinder, short circular conical surface, long cone surface, spherical surface, short helicoid and long spire face.Here surface is
Conceptual model, the size and length carried are to consider that the big plane of absolute dimension, which differs, surely limits at 3 points from limiting angle,
And the small plane of size also not necessarily only limits a bit.
3rd, example
The present embodiment is using the toggle of engine as research object.Toggle is mainly by piston, connecting rod
It is formed with attachmentes such as three big main part of bent axle and compression ring, oil ring, connecting rod caps.It is produced when its most important function is exactly by fuel combustion
Raw thermal energy is the mechanical energy of reciprocating motion of the pistons, then is changed into bent axle rotary motion and externally exports power.It is so bent
The general function of handle link mechanism be energy conversion or power output, it is organic by all kinds of execution parts, driving parts and locating element
The function is completed in combination.From the point of view of whole engine operation, which also be unable to do without two kinds of important media, i.e. gas and vapour
Oil.The presence of these media causes the design needs of product to consider that adding specific part or structure operates medium.
From the motion process of motor mechanisms, general function is decomposed into accept high pressure gas, conduction longitudinal thrust and
Export lateral dynamics.Each subfunction can be decomposed further again, until Functional Unit.Each Functional Unit can correspond to phase again
The behavior stream answered and behavior member.
After having function-behavior stream duplex structure and corresponding coding, the gene expression stage can be entered.First to double-strand
Structure carries out lock out operation and concatenation, and behavior stream chain is obtained by process of reverse-transcription.Then, it is turned over according to behavior stream cipher
It translates to obtain the structure on behavior surface, the i.e. concept of product.Entire translation process can be illustrated with Fig. 3.
After having the behavior surface of single part, it is possible to carry out the reasonable combination on surface, the sky between behavior surface
Gap adds joint face, so as to form the structure with continuous surface.Meanwhile it in order to meet kinematics of machinery requirement, needs pair
Surface hypostazation carries out relevant surfaces artificial amendment.It may finally obtain each part of the toggle such as Fig. 4
Behavior surface on body and each part is for final surface identification and kinematic pair matching.
After obtaining all behavior surfaces and classifying by part body, begin to traverse the behavior surface of each part
Set, the surface type of reference movement pair select feasible mating face from different set, until pairing is completed two-by-two,
All surfaces have all been traversed, and finally obtain assembly.
Claims (5)
1. a kind of product intelligent assembly method based on movement pair surface identification, which is characterized in that this method includes the following steps：
1) each part of product is obtained；
2) surface of each part is extracted, and is classified to the surface, establishes the behavior surface collection of each part；
3) the behavior surface set of each part is traversed, according to movement pair surface pair principle, obtains the pairing on each behavior surface
Surface forms assembling solution；
4) constraint degree evaluation is carried out to the assembling solution, judges whether evaluation result meets sets requirement, if so, performing step
5), if it is not, then return to step 3)；
5) product that output assembling is completed；
The step 3) is specially：
301) a behavior surface a in a certain behavior surface set A is obtained, an energy is searched in gathering on other behavior surfaces
Enough and behavior surface a is paired into another behavior surface b of kinematic pair；
302) the behavior surface set A is traversed；
303) behavior surface set A is replaced with into another behavior surface set B, return to step 301), until all behavior surfaces
COLLECTION TRAVERSALSThe finishes.
2. the product intelligent assembly method according to claim 1 based on movement pair surface identification, which is characterized in that described
In step 2), the classification of piece surface includes behavior surface and non-behavior surface.
3. the product intelligent assembly method according to claim 2 based on movement pair surface identification, which is characterized in that described
In step 2), the surface for extracting each part is specially：
201) function-behavior stream duplex structure of product is obtained according to the part of product and function, according to the function-behavior stream
Duplex structure obtains behavior stream chain；
202) behavior surface is solved according to each behavior stream cipher on behavior stream chain, is obtained according to the behavior surface solved
Obtain non-behavior surface.
4. the product intelligent assembly method according to claim 1 based on movement pair surface identification, which is characterized in that described
Kinematic pair includes prismatic pair, revolute, spherical pair, gear pair, screw pair and cam pair.
5. the product intelligent assembly method according to claim 1 based on movement pair surface identification, which is characterized in that described
In step 4), the evaluation result of constraint degree evaluation is obtained according to artificial experience.
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| CN107891257A (en) * | 2017-09-30 | 2018-04-10 | 同济大学 | A kind of Intelligent assembly system based on industrial 4.0 technology platforms |
| CN109408918A (en) * | 2018-10-11 | 2019-03-01 | 上海航天精密机械研究所 | A kind of Alternative Collaborative Manufacturing method based on digital transfer |
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| CN101364244A (en) * | 2008-08-07 | 2009-02-11 | 同济大学 | Product gene modelling approach based on behavior semantic network identity model |
| CN101777087A (en) * | 2010-01-26 | 2010-07-14 | 同济大学 | Product function gene modeling system and method |
| CN102129494A (en) * | 2011-03-04 | 2011-07-20 | 华中科技大学 | Product assembly representation method based on engineering connection relationship |
| CN103310058A (en) * | 2013-06-17 | 2013-09-18 | 西北工业大学 | Dimension chain checking method based on three-dimensional model |
| CN103729492A (en) * | 2013-10-10 | 2014-04-16 | 同济大学 | Modeling method based on behavior flow function and behavior coupling relation |
| CN104636528A (en) * | 2013-11-15 | 2015-05-20 | 同济大学 | Engine modeling method based on behavior flow complex product function community and evolving of behavior flow complex product function community |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010096242A (en) * | 2008-10-15 | 2010-04-30 | Ricoh Co Ltd | Gear design support method, gear design support device, gear design support program and storage medium |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101364244A (en) * | 2008-08-07 | 2009-02-11 | 同济大学 | Product gene modelling approach based on behavior semantic network identity model |
| CN101777087A (en) * | 2010-01-26 | 2010-07-14 | 同济大学 | Product function gene modeling system and method |
| CN102129494A (en) * | 2011-03-04 | 2011-07-20 | 华中科技大学 | Product assembly representation method based on engineering connection relationship |
| CN103310058A (en) * | 2013-06-17 | 2013-09-18 | 西北工业大学 | Dimension chain checking method based on three-dimensional model |
| CN103729492A (en) * | 2013-10-10 | 2014-04-16 | 同济大学 | Modeling method based on behavior flow function and behavior coupling relation |
| CN104636528A (en) * | 2013-11-15 | 2015-05-20 | 同济大学 | Engine modeling method based on behavior flow complex product function community and evolving of behavior flow complex product function community |
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